public void InflateTest(float x, float y, float width, float height)
{
RectangleF rect = new RectangleF(x, y, width, height);
RectangleF inflatedRect = new RectangleF(x - width, y - height, width + 2 * width, height + 2 * height);
rect.Inflate(width, height);
Assert.Equal(inflatedRect, rect);
SizeF s = new SizeF(x, y);
inflatedRect = RectangleF.Inflate(rect, x, y);
rect.Inflate(s);
Assert.Equal(inflatedRect, rect);
}